Docs: Should be able to distinguish between different types with names only differing by case

[ben-polinsky]

Currently no way to distinguish between aNamespace.myType and aNamespace.MyType

• our url structure doesn't include type information
• while this part of urls are case sensitive, filesystems have mixed support for case sensitive paths (remember this is a static site - all pages are html files) - whichever type's file is created first will be overwritten.

From https://github.com/iTwin/itwinjs-core/pull/5455